Throttle-control device



March 1929- L. F. MEUNIER .3

THROTTLE CONTROL DEVICE Fi1ed.Apri1 25, 1927 J 9' ,lgi

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Patented Mar. 5, 1929.

UNITED STATES PATENT orrlc LEON r. MEUNIER, or CLEVELAND, onio, assmnon T0 omcaoo rnnumrio moor.

conrm,or new YORK, 1v. Y., A conroaa'rron or new mnsmr.

THBOTTLE- CONTROL DEVICE.

Application filed April 25, 1927. Serial m3. 186,340.

This invention relates to fluid pressure operated tools and more particularly to manually operable devices for controlling the pressure fluid. The invention has direct application to reversing throttle devices of the sleeve type.

One object of the invention is to limit at will the extent of movement of the throttle mechanism. Another object is to prevent accidental reverse operation of a fluid ressure tool. Other objects will be apparent 'rom the detailed description which follows:

In order to illustrate the invention, one concrete embodiment thereof is shown in the accompanying drawings, in which:

Fig. 1 is a plan view of a throttle handle secured to a fluid pressure motor or tool, only a pprtion of the latter being shown;

ig. 2 is a sectional view on the line 2-2 of Fi 1 ig. 3 is a transverse sectional view substantially on the line 33 of Fig. 2;

Fi s. 4 and 5 are plan views of a portion of Fig. lshowing the sleeve which operates the throttle mechanism in different operative positions. 1

The invention is disclosed as embodied in a manual control or throttle handle indicated generally at A and adapted to be secured in any suitable manner as by a clamp or union nut 6 to the handle extension of a motor casing B which may form part of a fluid pressure operated tool, such as a pneumatic tool adapted for drillin reaming, tapping and similar operations. gince the motor which is to be controlled may be of any suitable or desired type and forms no part of the present invention, a more complete showing and description thereof is omitted.

The control device or throttle handle is of the reversing type and comprises a hollow or tubular grip portion 7 serving as a conduit for the motive fluid which enters the. same through the fitting 8 to which a supply conduit (not shown) is attached. Rotatably mounted upon a reduced portion of grip 7 is a throttle sleeve 9 which is arranged to move the tubular member 10 disposed within a bore of the handle casing and supported for rotary movement in a bushing 11. A screw 12 threaded into openings in sleeve 9 and member 10 and extending through a slot 7 in the grip casing, provides the connection between sleeve 9 and member 10. Member 10 extends.

beyond grip casing 7 to engage a stem 13 on a throttle valve proper 14 rotatably mounted within a bushing 15 within motor casing B i so that rotary motion imparted to throttle sleeve 9 is transmitted to the valve proper 14. In the present device sleeve 9 is rotatable in either direction from a central or neutral position, which may be indicated to the o rator through the action of a stop locator all 16 backed by a sprin 17 and engaging a bore 9" in the sleeve. Ba 1 l6 and its spring 17 may be enclosed in a tube 18 extending transversely of the bore of the handle device. The throttle sleeve is shown in neutral position in Figs.

1 and 2. Rotation of the sleeve to the right to the position shown in Fig. 5, admits motive fluid to motor casing B to operate the motor in a forward direction while rotation of sleeve 9 from the neutral position, shown in Fi 1 and 2, to the left to the position shown in ig. 4 reverses the motor.

In performing certain kinds of work with portable tools, such as reaming, it is notdesirableto reverse the motor, but to operate it in one direction only. The present invention, accordingly, contemplates suitable meansfor limiting at will the movement of the throttle sleeve so that the motor cannot be reversed. To this end sleeve 9 is formed adjacent one end with an axially disposed undercut slot or recess 20 in which is slidably disposed a block or slide 21. The adjacent portion of the grip casing is formed with a recess 22 of suitable extent to receive a or- 1 tion of slide 21 when the latter is move so asto project beyond sleeve 9. The extent of recess 22 is such as to receive the projecting end of slide 21 when the throttle sleeve 9 is at or between its neutral and forward position (Figs. 1 and 5) and notto receive it when sleeve 9 is moved from neutral to reverse position (Fig. 4.). It is, accordingly, apparent that when the operationof the motor is to be limited to one direction only, the operator will force slide 21 with his thumb outwardly into recess 22 which will enable the motor to be operated in the forward direction but will positively lock the throttle sleeve 9 from movement to reversing position. Frictional means are provided for retaining slide 21 in its adjusted position. j Such means may take posed in bores 24 in the under taco of slide 21 and arranged to bear against the portion of the grip easing therebeneath.

, While a preferred form of the invention is herein shown and described, it is to be unnerstood that the invention is not limited to the detailed description thereof, but covers all changes, modifications and adaptations with in the scope of the appended claims.

I claim as my invention 1. The combination with a fluid pressure operated motor of manual control means for the motive fluid for operating the motor in reverse directions, and means operable at will for confining said first named means to oper ating'the motor in one direction only.

2. The combination with a fluid pressure tool of a handle therefor having throttle means for controlling the admission of motive fluid to operate the tool in reverse directions, and means including a movable stop for confining the operation of the throttle means to controlo't the tool in one direction only.

3. The combination with a fluid pressure too'l oi a handle therefor serving as a conduit for the motivefluid, throttle means on said handle for controlling the admission of motive fluid to operate the tool in reverse directions, manual means for actuating said throttle means comprising av rotatable sleeve, and stop means including a movable member operable at Will to limit the movement of said sleeve so as to confine the operation of said tool to one direction only.

' 4:. The combination with a fluid pressure tool of a handle therefor serving as a conduit for the motive fluid, throttle means on said handle for controlling the admission of motive fluid to operate the tool in reverse directions, manual means for actuating said throttle means comprising a rotatable sleeve, and cooperating means in said handle and on said sleeve a ranged for preventing rotation of said sleeve to tool reversing position.

'5. The combination with a fluid. pressure tool of ahandle therefor serving as a conduit for the motive fluid, throttle means on said handle for controlling the admission oi inotive fluid to operate the tool in reverse directions, manual means for actuating said throttle means comprising a rotatable sleeve, and cooperating means on said handle and on. said sleeve arranged for preventing rotation of said sleeve to tool reversing position includingaslide forming a stop member.

6. The combination With a fluid pressure tool of a handle therefor serving as a conduit for the motive fluid, throttle means on said handle for controlling the admission of motive fluid to operate the tool in reverse directions, manual means for actuating said throttle means comprising a rotatable sleeve, and stop means operable at will to limit the movement'of said sleeve so as to confine the operation of said tool to one direction only comprising a slide on said sleeve cooperating with a recess in the adjacent portion of said handle.

7. The combination With a. fluid pressure tool of a iandle therefor serving as a conduit tor the motive fluid, throttle means on said handle for controlling the admission of m0- tive fluid to operate the tool in reverse directions, manual means for actuating said throttle means c mprising a rotatable sleeve, and stop means operable at will to limit the movement oi said sleeve so as to confine the operation of said tool to one direction only comprising a slide disposed in an undercut recess adjacent one end of said sleeve arranged to be projected into a cooperating slot or recess in said handle.

8. The combination with a fluid pressure tool of a handle therefor serving as a conduit for the motive fluid, throttle means on said handle for controlling the admission of motive fluid to operate the tool in reverse direc tions, manual means for actuating said throttle means comprising a rotatable sleeve, and stop means operable at will to limit the movement of said sleeve so as to confine the operation of said tool to one direction only comprising a slide disposed in an undercut recess adjacent one end of said sleeve arranged to be projected into a cooperating slot or recess in said handle and friction means for maintaining said slide in adjusted position.

9. The combination with a fluid pressure tool of a handle therefor serving as a conduit for the motive fluid, throttle means on said handle for controlling the admission of 1notive fluid to operate the tool in reverse directions, manual means for actuating said throttle means comprising a rotatable sleeve, and stop means operable at Will to limit the movement of said sleeve so asto confine theoperation of said tool to one directiononly comprising a slide disposed in an undercut recess adjacent one end of said sleeve arranged to be projected into a cooperating slot ==0r recess in said handle and friction means for maintaining said slide in adjusted position comprising a coiled spring iitting in where in the under side or said slide and engaging said sleeve.

10. A throttle handle for attachment to a fluid pressure tool to control the motor thereof, said handle having a sleeve rotatable in both directions from a neutral position toadmit motive fluid for forward and reverse operations of the motor, and means on said handle for restricting at will rotationof said sleeve to one direction only from said neutral position.

11. A throttle handle for attachment to a fluid pressure tool to control the motor thereof, said handle having a sleeve rotatable in both directions from a neutral position toadmit motive fluid for forward and reverse operations of the motor, and cooperating means on said sleeve and handle for'restricting at will rotation of said sleeve to one direction only from said neutral position including a stop member movable axially of said handle.

12. A throttle handle for attachment to a fluid pressure tool to oontrol the motor thereof having a sleeve rotatable in both directions from a neutral position to admit motive fluid for forward and reverse operations of the motor, and means on said handle for restricting at will rotation of said sleeve to one direction only from said neutral position comprising a slide member on said sleeve arranged to be moved so as to project therebeyon a means maintaining said member and said sleeve in frictional contact so that said member remains in adjusted position, the handle having a recess to receive the projecting end of said slide member when the latter is in 2 sleeve locking position.

Signed by me atCleveland, in the county of Cuyahoga and State of Ohio, this 28 day of February, 1927.

LEON F. MEUNIER.

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